[Bug 220867] Double loading of the if_tap module causes the system to crash, without panic and reboot

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220867

--- Comment #3 from commit-hook at freebsd.org ---
A commit references this bug:

Author: kevans
Date: Sun Apr 28 03:51:09 UTC 2019
New revision: 346803
URL: https://svnweb.freebsd.org/changeset/base/346803

Log:
  MFC r346688-r346689: tap(4) MODULE_VERSION

  r346688:
  tap(4): Add a MODULE_VERSION

  Otherwise tap(4) can be loaded by loader despite being compiled into the
  kernel, causing a panic as things try to double-initialize.

  r346689:
  tap(4): Correct driver name...

  PR:           220867

Changes:
_U  stable/11/
  stable/11/sys/net/if_tap.c
_U  stable/12/
  stable/12/sys/net/if_tap.c

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